566807221 has 4 divisors (see below), whose sum is σ = 596639200. Its totient is φ = 536975244.

The previous prime is 566807201. The next prime is 566807231. The reversal of 566807221 is 122708665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 566807221 - 2⁷ = 566807093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566807201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14915961 + ... + 14915998.

It is an arithmetic number, because the mean of its divisors is an integer number (149159800).

Almost surely, 2^566807221 is an apocalyptic number.

It is an amenable number.

566807221 is a deficient number, since it is larger than the sum of its proper divisors (29831979).

566807221 is a wasteful number, since it uses less digits than its factorization.

566807221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29831978.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 566807221 is about 23807.7134769385. The cubic root of 566807221 is about 827.5834393460.

The spelling of 566807221 in words is "five hundred sixty-six million, eight hundred seven thousand, two hundred twenty-one".